Okay, got my alignment issues solved, thanks to help here. Thanks to all.
But, more problems. I have only the 4X5 condensers in my old d2, and when I put the flat lens board with an 80mm lens on, I get enormous light fall off in the corners of a 2X2 negative. I have read conflicting things. Some say the 4X5 condensers work ok with the shorter lenses, others say not. In my case they do not seem to work. Or is there something else obvious ( and stupid), I may be missing?
I tend to think that I am missing something, as the guy I bought the enlarger from was a retired professional ( now dead), who said he did all his printing from 35-4X5 with the one condenser set. Surely he didn't use the 135mm lens for all formats?